ALEXANDRIA, Va., July 14 -- United States Patent no. 12,680,422, issued on July 14, was assigned to CNPC USA Corp. (Houston).
"Method for powering with a hybrid battery pack system" was invented by Wu Bi (Katy, Texas), Xu Wang (Beijing), Peng Cheng (Sugar Land, Texas) and Jiaxiang Ren (Houston).
According to the abstract* released by the U.S. Patent & Trademark Office: "The hybrid battery system includes a primary battery pack, a secondary battery pack, a battery control unit, a battery pack positive terminal, and a battery pack negative terminal. The battery control unit includes a management module and a variable resistor. The primary battery pack supplies power at lower temperatures, while the secondary battery pack supplies power at h...